Cat litter box



FIG. 1 is a perspective view of the cat litter box;

FIG. 2 is a right side elevation view of the cat litter box, the left side elevation being a mirror image thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for a cat litter box, as shown and described. 